package com.tedu.day02.oop;

/**
 * instanceof关键字---继承---多态
 * 用法：引用 instanceof 类名
 */
class Name{}
class ReName extends Name{}


public class Instanceof关键字 {
    public static void main(String[] args) {
        Name name = new Name();
        System.out.println(name instanceof Name);   //true
        System.out.println(name instanceof ReName); //false
    //继承--创建出来--关系--向上造型
    Name a = new ReName();
System.out.println(a instanceof Name);   //true
        System.out.println(a instanceof ReName); //true
}
}